What is a "reactor" in equine terminology?

In equine terminology, a "reactor" refers to an animal that tests positive for a specific disease, particularly in the context of veterinary medicine and disease management. This term is often used when discussing testing protocols for contagious diseases, such as Equine Infectious Anemia (EIA) or other infectious diseases where testing is crucial for the health management of a herd or population of horses.

When a horse is designated as a reactor, this indicates that it has reacted positively to a diagnostic test, suggesting the presence of the disease agent or the disease itself, which may require isolation or further testing and management to prevent the spread of the disease. This aspect of managing equine health is vital for trainers, breeders, and riding instructors to ensure the well-being of their horses and the safety of their operations.

Other options that refer to breeding horses, training methods, or equipment do not align with the specific health-related definition of a reactor in this context. Understanding this terminology is essential for anyone involved in equine care or management.